Analysis Report CJxeLKU314.dll

Overview

General Information

Sample Name: CJxeLKU314.dll
Analysis ID: 408918
MD5: e4c188ae2a8d453b361d339022a04221
SHA1: 0f2375eeb872fd5d5021145a56eae8529cedfbdb
SHA256: 0fa5df74d9d08845440766c204ae874a81a189b9856e2b841665eb9054040b4b
Tags: dllGoziISFBUrsnif
Infos:

Most interesting Screenshot:

Detection

Ursnif
Score: 48
Range: 0 - 100
Whitelisted: false
Confidence: 100%

Signatures

Yara detected Ursnif
Contains functionality to call native functions
Contains functionality to check if a debugger is running (IsDebuggerPresent)
Contains functionality to dynamically determine API calls
Contains functionality to open a port and listen for incoming connection (possibly a backdoor)
Contains functionality to query CPU information (cpuid)
Contains functionality to query locales information (e.g. system language)
Contains functionality to read the PEB
Creates a process in suspended mode (likely to inject code)
Detected potential crypto function
Found potential string decryption / allocating functions
PE file contains an invalid checksum
Program does not show much activity (idle)
Sample execution stops while process was sleeping (likely an evasion)
Uses 32bit PE files
Uses code obfuscation techniques (call, push, ret)

Classification

Compliance:

barindex
Uses 32bit PE files
Source: CJxeLKU314.dll Static PE information: 32BIT_MACHINE, EXECUTABLE_IMAGE, DLL
Source: CJxeLKU314.dll Static PE information: DYNAMIC_BASE, NX_COMPAT
Source: Binary string: c:\938\follow-Record\Suffix\observe-element\force.pdb source: loaddll32.exe, 00000000.00000002.596199111.000000006DE3A000.00000002.00020000.sdmp, rundll32.exe, 00000002.00000002.610940867.000000006DE3A000.00000002.00020000.sdmp, rundll32.exe, 0000000F.00000002.561475064.000000006DE3A000.00000002.00020000.sdmp, rundll32.exe, 00000014.00000002.608296058.000000006DE3A000.00000002.00020000.sdmp, rundll32.exe, 00000018.00000002.538841611.000000006DE3A000.00000002.00020000.sdmp, CJxeLKU314.dll

Key, Mouse, Clipboard, Microphone and Screen Capturing:

barindex
Yara detected Ursnif
Source: Yara match File source: 3.2.rundll32.exe.6ddb0000.1.unpack, type: UNPACKEDPE

E-Banking Fraud:

barindex
Yara detected Ursnif
Source: Yara match File source: 3.2.rundll32.exe.6ddb0000.1.unpack, type: UNPACKEDPE

System Summary:

barindex
Contains functionality to call native functions
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_6DDB2485 NtQueryVirtualMemory, 3_2_6DDB2485
Detected potential crypto function
Source: C:\Windows\System32\loaddll32.exe Code function: 0_2_6DDF1C3C 0_2_6DDF1C3C
Source: C:\Windows\System32\loaddll32.exe Code function: 0_2_6DDF3E00 0_2_6DDF3E00
Source: C:\Windows\System32\loaddll32.exe Code function: 0_2_6DE184BB 0_2_6DE184BB
Source: C:\Windows\System32\loaddll32.exe Code function: 0_2_6DE267D9 0_2_6DE267D9
Source: C:\Windows\System32\loaddll32.exe Code function: 0_2_6DE05150 0_2_6DE05150
Source: C:\Windows\System32\loaddll32.exe Code function: 0_2_6DE0E079 0_2_6DE0E079
Source: C:\Windows\System32\loaddll32.exe Code function: 0_2_6DE20396 0_2_6DE20396
Source: C:\Windows\System32\loaddll32.exe Code function: 0_2_6DE302BC 0_2_6DE302BC
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 2_2_6DDF1C3C 2_2_6DDF1C3C
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 2_2_6DDF3E00 2_2_6DDF3E00
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 2_2_6DE184BB 2_2_6DE184BB
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 2_2_6DE267D9 2_2_6DE267D9
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 2_2_6DE05150 2_2_6DE05150
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 2_2_6DE0E079 2_2_6DE0E079
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 2_2_6DE20396 2_2_6DE20396
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 2_2_6DE302BC 2_2_6DE302BC
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_6DDB2264 3_2_6DDB2264
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 15_2_6DDF1C3C 15_2_6DDF1C3C
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 15_2_6DDF3E00 15_2_6DDF3E00
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 15_2_6DE184BB 15_2_6DE184BB
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 15_2_6DE267D9 15_2_6DE267D9
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 15_2_6DE05150 15_2_6DE05150
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 15_2_6DE0E079 15_2_6DE0E079
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 15_2_6DE20396 15_2_6DE20396
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 15_2_6DE302BC 15_2_6DE302BC
Found potential string decryption / allocating functions
Source: C:\Windows\System32\loaddll32.exe Code function: String function: 6DDF0990 appears 34 times
Source: C:\Windows\System32\loaddll32.exe Code function: String function: 6DDF00AC appears 100 times
Source: C:\Windows\SysWOW64\rundll32.exe Code function: String function: 6DDF0990 appears 68 times
Source: C:\Windows\SysWOW64\rundll32.exe Code function: String function: 6DDF00AC appears 200 times
Source: C:\Windows\SysWOW64\rundll32.exe Code function: String function: 6DE123A9 appears 36 times
Source: C:\Windows\SysWOW64\rundll32.exe Code function: String function: 6DDF00E0 appears 58 times
Uses 32bit PE files
Source: CJxeLKU314.dll Static PE information: 32BIT_MACHINE, EXECUTABLE_IMAGE, DLL
Source: classification engine Classification label: mal48.troj.winDLL@55/0@0/0
Source: C:\Windows\System32\conhost.exe Mutant created: \Sessions\1\BaseNamedObjects\Local\SM0:5972:120:WilError_01
Source: C:\Windows\System32\conhost.exe Mutant created: \Sessions\1\BaseNamedObjects\Local\SM0:6188:120:WilError_01
Source: C:\Windows\System32\conhost.exe Mutant created: \Sessions\1\BaseNamedObjects\Local\SM0:6636:120:WilError_01
Source: C:\Windows\System32\conhost.exe Mutant created: \Sessions\1\BaseNamedObjects\Local\SM0:5664:120:WilError_01
Source: C:\Windows\System32\conhost.exe Mutant created: \Sessions\1\BaseNamedObjects\Local\SM0:4132:120:WilError_01
Source: C:\Windows\System32\conhost.exe Mutant created: \Sessions\1\BaseNamedObjects\Local\SM0:6268:120:WilError_01
Source: C:\Windows\System32\conhost.exe Mutant created: \Sessions\1\BaseNamedObjects\Local\SM0:6684:120:WilError_01
Source: C:\Windows\System32\conhost.exe Mutant created: \Sessions\1\BaseNamedObjects\Local\SM0:6868:120:WilError_01
Source: C:\Windows\System32\conhost.exe Mutant created: \Sessions\1\BaseNamedObjects\Local\SM0:6260:120:WilError_01
Source: C:\Windows\System32\conhost.exe Mutant created: \Sessions\1\BaseNamedObjects\Local\SM0:6368:120:WilError_01
Source: C:\Windows\System32\conhost.exe Mutant created: \Sessions\1\BaseNamedObjects\Local\SM0:6804:120:WilError_01
Source: C:\Windows\System32\conhost.exe Mutant created: \Sessions\1\BaseNamedObjects\Local\SM0:1140:120:WilError_01
Source: CJxeLKU314.dll Static PE information: Section: .text IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_READ
Source: C:\Windows\System32\loaddll32.exe Key opened: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiers Jump to behavior
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe C:\Users\user\Desktop\CJxeLKU314.dll,Connectdark
Source: unknown Process created: C:\Windows\System32\loaddll32.exe loaddll32.exe 'C:\Users\user\Desktop\CJxeLKU314.dll'
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\cmd.exe cmd.exe /C rundll32.exe 'C:\Users\user\Desktop\CJxeLKU314.dll',#1
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe C:\Users\user\Desktop\CJxeLKU314.dll,Connectdark
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe 'C:\Users\user\Desktop\CJxeLKU314.dll',#1
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Island
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Island
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\System32\conhost.exe C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\System32\conhost.exe C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Matter m
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Matter m
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\System32\conhost.exe C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\System32\conhost.exe C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe C:\Users\user\Desktop\CJxeLKU314.dll,Mindlake
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Island
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\System32\conhost.exe C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe C:\Users\user\Desktop\CJxeLKU314.dll,Porthigh
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Matter m
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Island
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\System32\conhost.exe C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\System32\conhost.exe C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe C:\Users\user\Desktop\CJxeLKU314.dll,Problemscale
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Matter m
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\System32\conhost.exe C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe C:\Users\user\Desktop\CJxeLKU314.dll,WingGrass
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Island
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\System32\conhost.exe C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Island
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\System32\conhost.exe C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Island
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Matter m
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\System32\conhost.exe C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Matter m
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Matter m
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\System32\conhost.exe C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\cmd.exe cmd.exe /C rundll32.exe 'C:\Users\user\Desktop\CJxeLKU314.dll',#1 Jump to behavior
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe C:\Users\user\Desktop\CJxeLKU314.dll,Connectdark Jump to behavior
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe C:\Users\user\Desktop\CJxeLKU314.dll,Mindlake Jump to behavior
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe C:\Users\user\Desktop\CJxeLKU314.dll,Porthigh Jump to behavior
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe C:\Users\user\Desktop\CJxeLKU314.dll,Problemscale Jump to behavior
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe C:\Users\user\Desktop\CJxeLKU314.dll,WingGrass Jump to behavior
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Island Jump to behavior
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Matter m Jump to behavior
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe 'C:\Users\user\Desktop\CJxeLKU314.dll',#1 Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Island Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Matter m Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Island Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Matter m Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Island Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Matter m Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Island Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Matter m Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Island Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Matter m Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Island Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Matter m Jump to behavior
Source: Window Recorder Window detected: More than 3 window changes detected
Source: CJxeLKU314.dll Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_IMPORT
Source: CJxeLKU314.dll Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_RESOURCE
Source: CJxeLKU314.dll Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_BASERELOC
Source: CJxeLKU314.dll Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_DEBUG
Source: CJxeLKU314.dll Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG
Source: CJxeLKU314.dll Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_IAT
Source: CJxeLKU314.dll Static PE information: DYNAMIC_BASE, NX_COMPAT
Source: CJxeLKU314.dll Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_DEBUG
Source: Binary string: c:\938\follow-Record\Suffix\observe-element\force.pdb source: loaddll32.exe, 00000000.00000002.596199111.000000006DE3A000.00000002.00020000.sdmp, rundll32.exe, 00000002.00000002.610940867.000000006DE3A000.00000002.00020000.sdmp, rundll32.exe, 0000000F.00000002.561475064.000000006DE3A000.00000002.00020000.sdmp, rundll32.exe, 00000014.00000002.608296058.000000006DE3A000.00000002.00020000.sdmp, rundll32.exe, 00000018.00000002.538841611.000000006DE3A000.00000002.00020000.sdmp, CJxeLKU314.dll
Source: CJxeLKU314.dll Static PE information: Data directory: IMAGE_DIRECTORY_ENTRY_IMPORT is in: .rdata
Source: CJxeLKU314.dll Static PE information: Data directory: IMAGE_DIRECTORY_ENTRY_RESOURCE is in: .rsrc
Source: CJxeLKU314.dll Static PE information: Data directory: IMAGE_DIRECTORY_ENTRY_BASERELOC is in: .reloc
Source: CJxeLKU314.dll Static PE information: Data directory: IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG is in: .rdata
Source: CJxeLKU314.dll Static PE information: Data directory: IMAGE_DIRECTORY_ENTRY_IAT is in: .rdata

Data Obfuscation:

barindex
Contains functionality to dynamically determine API calls
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_6DDB1F31 LoadLibraryA,GetProcAddress, 3_2_6DDB1F31
PE file contains an invalid checksum
Source: CJxeLKU314.dll Static PE information: real checksum: 0xf3990 should be: 0xf6bb8
Uses code obfuscation techniques (call, push, ret)
Source: C:\Windows\System32\loaddll32.exe Code function: 0_2_6DDF09D6 push ecx; ret 0_2_6DDF09E9
Source: C:\Windows\System32\loaddll32.exe Code function: 0_2_6DDF0075 push ecx; ret 0_2_6DDF0088
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 2_2_6DDF09D6 push ecx; ret 2_2_6DDF09E9
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 2_2_6DDF0075 push ecx; ret 2_2_6DDF0088
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_6DDB2253 push ecx; ret 3_2_6DDB2263
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_6DDB2200 push ecx; ret 3_2_6DDB2209
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 15_2_6DDF09D6 push ecx; ret 15_2_6DDF09E9
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 15_2_6DDF0075 push ecx; ret 15_2_6DDF0088

Hooking and other Techniques for Hiding and Protection:

barindex
Yara detected Ursnif
Source: Yara match File source: 3.2.rundll32.exe.6ddb0000.1.unpack, type: UNPACKEDPE
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\System32\conhost.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\System32\conhost.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\System32\conhost.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\System32\conhost.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\System32\conhost.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\System32\conhost.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\System32\conhost.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\System32\conhost.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\System32\conhost.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\System32\conhost.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\System32\conhost.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\System32\conhost.exe Process information set: NOOPENFILEERRORBOX Jump to behavior

Malware Analysis System Evasion:

barindex
Program does not show much activity (idle)
Source: all processes Thread injection, dropped files, key value created, disk infection and DNS query: no activity detected
Sample execution stops while process was sleeping (likely an evasion)
Source: C:\Windows\System32\conhost.exe Last function: Thread delayed
Source: C:\Windows\System32\conhost.exe Last function: Thread delayed
Source: C:\Windows\System32\conhost.exe Last function: Thread delayed
Source: C:\Windows\System32\conhost.exe Last function: Thread delayed
Source: C:\Windows\System32\conhost.exe Last function: Thread delayed

Anti Debugging:

barindex
Contains functionality to check if a debugger is running (IsDebuggerPresent)
Source: C:\Windows\System32\loaddll32.exe Code function: 0_2_6DE11F6D IsDebuggerPresent,SetUnhandledExceptionFilter,UnhandledExceptionFilter, 0_2_6DE11F6D
Contains functionality to dynamically determine API calls
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_6DDB1F31 LoadLibraryA,GetProcAddress, 3_2_6DDB1F31
Contains functionality to read the PEB
Source: C:\Windows\System32\loaddll32.exe Code function: 0_2_6DE1966F mov eax, dword ptr fs:[00000030h] 0_2_6DE1966F
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 2_2_6DE1966F mov eax, dword ptr fs:[00000030h] 2_2_6DE1966F
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 15_2_6DE1966F mov eax, dword ptr fs:[00000030h] 15_2_6DE1966F
Program does not show much activity (idle)
Source: all processes Thread injection, dropped files, key value created, disk infection and DNS query: no activity detected
Source: C:\Windows\System32\loaddll32.exe Code function: 0_2_6DE11F6D IsDebuggerPresent,SetUnhandledExceptionFilter,UnhandledExceptionFilter, 0_2_6DE11F6D
Source: C:\Windows\System32\loaddll32.exe Code function: 0_2_6DDF07A7 IsProcessorFeaturePresent,IsDebuggerPresent,SetUnhandledExceptionFilter,UnhandledExceptionFilter, 0_2_6DDF07A7
Source: C:\Windows\System32\loaddll32.exe Code function: 0_2_6DDF0288 SetUnhandledExceptionFilter,UnhandledExceptionFilter,GetCurrentProcess,TerminateProcess, 0_2_6DDF0288
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 2_2_6DE11F6D IsDebuggerPresent,SetUnhandledExceptionFilter,UnhandledExceptionFilter, 2_2_6DE11F6D
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 2_2_6DDF07A7 IsProcessorFeaturePresent,IsDebuggerPresent,SetUnhandledExceptionFilter,UnhandledExceptionFilter, 2_2_6DDF07A7
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 2_2_6DDF0288 SetUnhandledExceptionFilter,UnhandledExceptionFilter,GetCurrentProcess,TerminateProcess, 2_2_6DDF0288
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 15_2_6DE11F6D IsDebuggerPresent,SetUnhandledExceptionFilter,UnhandledExceptionFilter, 15_2_6DE11F6D
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 15_2_6DDF07A7 IsProcessorFeaturePresent,IsDebuggerPresent,SetUnhandledExceptionFilter,UnhandledExceptionFilter, 15_2_6DDF07A7
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 15_2_6DDF0288 SetUnhandledExceptionFilter,UnhandledExceptionFilter,GetCurrentProcess,TerminateProcess, 15_2_6DDF0288

HIPS / PFW / Operating System Protection Evasion:

barindex
Creates a process in suspended mode (likely to inject code)
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Island Jump to behavior
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Matter m Jump to behavior
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe 'C:\Users\user\Desktop\CJxeLKU314.dll',#1 Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Island Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Matter m Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Island Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Matter m Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Island Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Matter m Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Island Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Matter m Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Island Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Matter m Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Island Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process created: C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c cd Matter m Jump to behavior
Source: loaddll32.exe, 00000000.00000002.549620718.0000000001AA0000.00000002.00000001.sdmp, rundll32.exe, 00000002.00000002.574472644.0000000003900000.00000002.00000001.sdmp, rundll32.exe, 00000003.00000002.613558655.0000000003340000.00000002.00000001.sdmp, rundll32.exe, 0000000C.00000002.613557283.0000000003540000.00000002.00000001.sdmp, rundll32.exe, 0000000F.00000002.500091312.00000000031B0000.00000002.00000001.sdmp, rundll32.exe, 00000014.00000002.597280299.00000000031B0000.00000002.00000001.sdmp, rundll32.exe, 00000018.00000002.496937623.0000000003570000.00000002.00000001.sdmp Binary or memory string: Shell_TrayWnd
Source: loaddll32.exe, 00000000.00000002.549620718.0000000001AA0000.00000002.00000001.sdmp, rundll32.exe, 00000002.00000002.574472644.0000000003900000.00000002.00000001.sdmp, rundll32.exe, 00000003.00000002.613558655.0000000003340000.00000002.00000001.sdmp, rundll32.exe, 0000000C.00000002.613557283.0000000003540000.00000002.00000001.sdmp, rundll32.exe, 0000000F.00000002.500091312.00000000031B0000.00000002.00000001.sdmp, rundll32.exe, 00000014.00000002.597280299.00000000031B0000.00000002.00000001.sdmp, rundll32.exe, 00000018.00000002.496937623.0000000003570000.00000002.00000001.sdmp Binary or memory string: Progman
Source: loaddll32.exe, 00000000.00000002.549620718.0000000001AA0000.00000002.00000001.sdmp, rundll32.exe, 00000002.00000002.574472644.0000000003900000.00000002.00000001.sdmp, rundll32.exe, 00000003.00000002.613558655.0000000003340000.00000002.00000001.sdmp, rundll32.exe, 0000000C.00000002.613557283.0000000003540000.00000002.00000001.sdmp, rundll32.exe, 0000000F.00000002.500091312.00000000031B0000.00000002.00000001.sdmp, rundll32.exe, 00000014.00000002.597280299.00000000031B0000.00000002.00000001.sdmp, rundll32.exe, 00000018.00000002.496937623.0000000003570000.00000002.00000001.sdmp Binary or memory string: SProgram Managerl
Source: loaddll32.exe, 00000000.00000002.549620718.0000000001AA0000.00000002.00000001.sdmp, rundll32.exe, 00000002.00000002.574472644.0000000003900000.00000002.00000001.sdmp, rundll32.exe, 00000003.00000002.613558655.0000000003340000.00000002.00000001.sdmp, rundll32.exe, 0000000C.00000002.613557283.0000000003540000.00000002.00000001.sdmp, rundll32.exe, 0000000F.00000002.500091312.00000000031B0000.00000002.00000001.sdmp, rundll32.exe, 00000014.00000002.597280299.00000000031B0000.00000002.00000001.sdmp, rundll32.exe, 00000018.00000002.496937623.0000000003570000.00000002.00000001.sdmp Binary or memory string: Shell_TrayWnd,
Source: loaddll32.exe, 00000000.00000002.549620718.0000000001AA0000.00000002.00000001.sdmp, rundll32.exe, 00000002.00000002.574472644.0000000003900000.00000002.00000001.sdmp, rundll32.exe, 00000003.00000002.613558655.0000000003340000.00000002.00000001.sdmp, rundll32.exe, 0000000C.00000002.613557283.0000000003540000.00000002.00000001.sdmp, rundll32.exe, 0000000F.00000002.500091312.00000000031B0000.00000002.00000001.sdmp, rundll32.exe, 00000014.00000002.597280299.00000000031B0000.00000002.00000001.sdmp, rundll32.exe, 00000018.00000002.496937623.0000000003570000.00000002.00000001.sdmp Binary or memory string: Progmanlock

Language, Device and Operating System Detection:

barindex
Contains functionality to query CPU information (cpuid)
Source: C:\Windows\System32\loaddll32.exe Code function: 0_2_6DDF0604 cpuid 0_2_6DDF0604
Contains functionality to query locales information (e.g. system language)
Source: C:\Windows\System32\loaddll32.exe Code function: IsValidCodePage,_wcschr,_wcschr,GetLocaleInfoW, 0_2_6DE2DD96
Source: C:\Windows\System32\loaddll32.exe Code function: GetLocaleInfoW, 0_2_6DE2DF65
Source: C:\Windows\System32\loaddll32.exe Code function: EnumSystemLocalesW, 0_2_6DE23952
Source: C:\Windows\System32\loaddll32.exe Code function: GetLocaleInfoW,GetLocaleInfoW,GetACP, 0_2_6DE2E518
Source: C:\Windows\System32\loaddll32.exe Code function: GetUserDefaultLCID,IsValidCodePage,IsValidLocale,GetLocaleInfoW,GetLocaleInfoW, 0_2_6DE2E6EC
Source: C:\Windows\System32\loaddll32.exe Code function: GetLocaleInfoW, 0_2_6DE2E61F
Source: C:\Windows\System32\loaddll32.exe Code function: GetLocaleInfoW, 0_2_6DDEF1B7
Source: C:\Windows\System32\loaddll32.exe Code function: GetLocaleInfoW,GetLocaleInfoW,GetLocaleInfoW, 0_2_6DE2E19F
Source: C:\Windows\System32\loaddll32.exe Code function: EnumSystemLocalesW, 0_2_6DE2E112
Source: C:\Windows\System32\loaddll32.exe Code function: EnumSystemLocalesW, 0_2_6DE2E077
Source: C:\Windows\System32\loaddll32.exe Code function: EnumSystemLocalesW, 0_2_6DE2E00E
Source: C:\Windows\System32\loaddll32.exe Code function: GetLocaleInfoW, 0_2_6DE2E3EF
Source: C:\Windows\System32\loaddll32.exe Code function: ___crtGetLocaleInfoEx, 0_2_6DDEF364
Source: C:\Windows\System32\loaddll32.exe Code function: GetLocaleInfoW, 0_2_6DE24323
Source: C:\Windows\SysWOW64\rundll32.exe Code function: IsValidCodePage,_wcschr,_wcschr,GetLocaleInfoW, 2_2_6DE2DD96
Source: C:\Windows\SysWOW64\rundll32.exe Code function: GetLocaleInfoW, 2_2_6DE2DF65
Source: C:\Windows\SysWOW64\rundll32.exe Code function: EnumSystemLocalesW, 2_2_6DE23952
Source: C:\Windows\SysWOW64\rundll32.exe Code function: GetLocaleInfoW,GetLocaleInfoW,GetACP, 2_2_6DE2E518
Source: C:\Windows\SysWOW64\rundll32.exe Code function: GetUserDefaultLCID,IsValidCodePage,IsValidLocale,GetLocaleInfoW,GetLocaleInfoW, 2_2_6DE2E6EC
Source: C:\Windows\SysWOW64\rundll32.exe Code function: GetLocaleInfoW, 2_2_6DE2E61F
Source: C:\Windows\SysWOW64\rundll32.exe Code function: GetLocaleInfoW, 2_2_6DDEF1B7
Source: C:\Windows\SysWOW64\rundll32.exe Code function: GetLocaleInfoW,GetLocaleInfoW,GetLocaleInfoW, 2_2_6DE2E19F
Source: C:\Windows\SysWOW64\rundll32.exe Code function: EnumSystemLocalesW, 2_2_6DE2E112
Source: C:\Windows\SysWOW64\rundll32.exe Code function: EnumSystemLocalesW, 2_2_6DE2E077
Source: C:\Windows\SysWOW64\rundll32.exe Code function: EnumSystemLocalesW, 2_2_6DE2E00E
Source: C:\Windows\SysWOW64\rundll32.exe Code function: GetLocaleInfoW, 2_2_6DE2E3EF
Source: C:\Windows\SysWOW64\rundll32.exe Code function: ___crtGetLocaleInfoEx, 2_2_6DDEF364
Source: C:\Windows\SysWOW64\rundll32.exe Code function: GetLocaleInfoW, 2_2_6DE24323
Source: C:\Windows\SysWOW64\rundll32.exe Code function: GetLocaleInfoA,GetSystemDefaultUILanguage,VerLanguageNameA, 3_2_6DDB1566
Source: C:\Windows\SysWOW64\rundll32.exe Code function: IsValidCodePage,_wcschr,_wcschr,GetLocaleInfoW, 15_2_6DE2DD96
Source: C:\Windows\SysWOW64\rundll32.exe Code function: GetLocaleInfoW, 15_2_6DE2DF65
Source: C:\Windows\SysWOW64\rundll32.exe Code function: EnumSystemLocalesW, 15_2_6DE23952
Source: C:\Windows\SysWOW64\rundll32.exe Code function: GetLocaleInfoW,GetLocaleInfoW,GetACP, 15_2_6DE2E518
Source: C:\Windows\SysWOW64\rundll32.exe Code function: GetUserDefaultLCID,IsValidCodePage,IsValidLocale,GetLocaleInfoW,GetLocaleInfoW, 15_2_6DE2E6EC
Source: C:\Windows\SysWOW64\rundll32.exe Code function: GetLocaleInfoW, 15_2_6DE2E61F
Source: C:\Windows\SysWOW64\rundll32.exe Code function: GetLocaleInfoW, 15_2_6DDEF1B7
Source: C:\Windows\SysWOW64\rundll32.exe Code function: GetLocaleInfoW,GetLocaleInfoW,GetLocaleInfoW, 15_2_6DE2E19F
Source: C:\Windows\SysWOW64\rundll32.exe Code function: EnumSystemLocalesW, 15_2_6DE2E112
Source: C:\Windows\SysWOW64\rundll32.exe Code function: EnumSystemLocalesW, 15_2_6DE2E077
Source: C:\Windows\SysWOW64\rundll32.exe Code function: EnumSystemLocalesW, 15_2_6DE2E00E
Source: C:\Windows\SysWOW64\rundll32.exe Code function: GetLocaleInfoW, 15_2_6DE2E3EF
Source: C:\Windows\SysWOW64\rundll32.exe Code function: ___crtGetLocaleInfoEx, 15_2_6DDEF364
Source: C:\Windows\SysWOW64\rundll32.exe Code function: GetLocaleInfoW, 15_2_6DE24323
Source: C:\Windows\System32\loaddll32.exe Code function: 0_2_6DDF09F0 GetSystemTimeAsFileTime,GetCurrentThreadId,GetCurrentProcessId,QueryPerformanceCounter, 0_2_6DDF09F0
Source: C:\Windows\System32\loaddll32.exe Code function: 0_2_6DE28951 _free,GetTimeZoneInformation,WideCharToMultiByte,WideCharToMultiByte,_free, 0_2_6DE28951
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_6DDB146C CreateEventA,GetVersion,GetCurrentProcessId,OpenProcess,GetLastError, 3_2_6DDB146C

Stealing of Sensitive Information:

barindex
Yara detected Ursnif
Source: Yara match File source: 3.2.rundll32.exe.6ddb0000.1.unpack, type: UNPACKEDPE

Remote Access Functionality:

barindex
Yara detected Ursnif
Source: Yara match File source: 3.2.rundll32.exe.6ddb0000.1.unpack, type: UNPACKEDPE
Contains functionality to open a port and listen for incoming connection (possibly a backdoor)
Source: C:\Windows\System32\loaddll32.exe Code function: 0_2_6DDB16BC __ehhandler$??1_Scoped_lock@?$SafeRWList@UListEntry@details@Concurrency@@VNoCount@CollectionTypes@23@V_ReaderWriterLock@23@@details@Concurrency@@QAE@XZ, 0_2_6DDB16BC
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 15_2_6DDB16BC __ehhandler$??1_Scoped_lock@?$SafeRWList@UListEntry@details@Concurrency@@VNoCount@CollectionTypes@23@V_ReaderWriterLock@23@@details@Concurrency@@QAE@XZ, 15_2_6DDB16BC
windows-stand
Hide Legend

Legend:

  • Process
  • Signature
  • Created File
  • DNS/IP Info
  • Is Dropped
  • Is Windows Process
  • Number of created Registry Values
  • Number of created Files
  • Visual Basic
  • Delphi
  • Java
  • .Net C# or VB.NET
  • C, C++ or other language
  • Is malicious
  • Internet
behaviorgraph top1 signatures2 2 Behavior Graph ID: 408918 Sample: CJxeLKU314.dll Startdate: 09/05/2021 Architecture: WINDOWS Score: 48 59 Yara detected  Ursnif 2->59 9 loaddll32.exe 1 2->9         started        process3 process4 11 cmd.exe 1 9->11         started        13 rundll32.exe 9->13         started        15 rundll32.exe 9->15         started        17 5 other processes 9->17 process5 19 rundll32.exe 11->19         started        21 cmd.exe 1 13->21         started        23 cmd.exe 1 13->23         started        25 cmd.exe 1 15->25         started        27 cmd.exe 1 15->27         started        29 cmd.exe 1 17->29         started        31 cmd.exe 1 17->31         started        33 cmd.exe 1 17->33         started        35 3 other processes 17->35 process6 51 2 other processes 19->51 37 conhost.exe 21->37         started        39 conhost.exe 23->39         started        41 conhost.exe 25->41         started        43 conhost.exe 27->43         started        45 conhost.exe 29->45         started        47 conhost.exe 31->47         started        49 conhost.exe 33->49         started        53 3 other processes 35->53 process7 55 conhost.exe 51->55         started        57 conhost.exe 51->57         started       
No contacted IP infos